US 12,436,016 B2
Residual gas volume measuring device and residual gas volume measuring method
Shuji Nakai, Kyoto (JP); Takashi Matsuki, Kyoto (JP); and Nobuaki Watanabe, Kyoto (JP)
Assigned to KYOTO ELECTRONICS MANUFACTURING CO., LTD., Kyoto (JP)
Appl. No. 18/043,587
Filed by KYOTO ELECTRONICS MANUFACTURING CO., LTD., Kyoto (JP)
PCT Filed Aug. 25, 2021, PCT No. PCT/JP2021/031106
§ 371(c)(1), (2) Date Mar. 1, 2023,
PCT Pub. No. WO2022/059444, PCT Pub. Date Mar. 24, 2022.
Claims priority of application No. 2020-156089 (JP), filed on Sep. 17, 2020.
Prior Publication US 2023/0358590 A1, Nov. 9, 2023
Int. Cl. G01F 22/02 (2006.01); G01N 7/04 (2006.01)
CPC G01F 22/02 (2013.01) [G01N 7/04 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A residual gas volume measuring device for measuring the volume of residual gas in a container to be tested, comprising:
an airtight container that is filled with a basic carbon dioxide absorbing liquid;
a first reservoir in which the carbon dioxide absorbing liquid is retained;
a first pipe through which the airtight container and the first reservoir are in communication with each other and that is filled with the carbon dioxide absorbing liquid;
a valve that is provided in the first pipe;
a second reservoir in which pressurization water is retained;
a second pipe through which the airtight container and the second reservoir are in communication with each other, a section closer to the airtight container of which is filled with the carbon dioxide absorbing liquid, and a section closer to the second reservoir of which is filled with the pressurization water; and
a pump that is provided in the section of the second pipe that is filled with the pressurization water, wherein
before the residual gas is introduced from the container to be tested into the airtight container, the pump sends the pressurization water in the second pipe toward the second reservoir with the valve open, and after the residual gas is introduced from the container to be tested into the airtight container, the pump sends the pressurization water in the second pipe toward the airtight container with the valve closed.